Skiving-machine



N. V. DYER.

SKlVlNG MACHINE.

APPLICATION man JUNE 20. 1911.

1,327,028, Patented Jan. 6, 1.920.

Aim

"suntan STATES PATENT OFFICE.

nnwnnn v. DYER, or HOLBROOK, MAssAonUsnrrs, nssrenon, BY MES'NE ASSIGN- nnnrs, T UNITED 'snon MAcnrnn'aY conrona'rron, orrnrnnson vnw JERSEY,

A CORPORATION OF NEW JERSEY.

SKIVING-MAQi-IINE.

Patented Jan. 6,1920.

Application filed June 20, 1917. Serial No. 175,986.

To all whom it may concern:

Be it known that I, NEWELL V. DYnn, a citizen of the United States, residing at Holbrook, in the county of Norfolk and State of Massachusetts, have invented certain Improvements in Skiving-Machines, of which the following description, in connection with the accompanying drawings, is aspecificw tion, like reference characters on the drawings indicating like parts in the several figures.

This invention relates to skiving machines and is herein illustrated in connection with a machine of the Amazeen type such as is shown in patent to Bayley No. 823,578.

In the manufacture of certain kinds of boots and shoes it is desirable to produce two or more scarfs which shall be different in width or in character or in both. For ex- 20 ample it may be desirable to produce along the top and front of a quarter a shoulder scarf preparatory to folding that edge, to produce along the back an overlap or seam scarf, and to produce along the bottom a feather edge scarf; and hitherto it has been necessary to adjust several parts of the ma chine to produce these different scarfs and particularly to change the height and inclination of the knife.

One feature of the present invention comprises, in a machine of the class described, a

knife, a feed roll for advancing the work to the knife, said feed roll comprising two substantially frusto-conical sections having opposed bases, and work gaging means constructed and arranged to guide the work over one surface to produce a straight scarf and to guide the work over the other surface to produce a shoulder scarf. lVith this con to struction it is possible to produce two different scarfs (for example a shoulder scarf and a seam scarf) without changing the relation between the knife and the roll. And in order to produce a third scarf readily, the feed roll is made vertically movable a predetermined distance, in the illustrative machine, by means of a treadle.

As has been explained two different scarfs may be produced by changing merely the po- ;0 sition of the edge gage. It is desirable, however, to dispense with the necessity for that adjustment. Accordingly another feature of the illi't-llllllfill comprises in a machine of the class described a skiving knife, a feed roll having two substantially frusto-conical sections the bases of which are opposed, a stationary edge gage, and a vertically movable edge gage against which the work may be presented or beneath which the work may be presented to the stationary gage as may be desired. "With this construction two scarfs of different character may be produced with-,

out making machine.

According to another feature of the inven tion the feed roll and knife are normally so any adjustment whatever in the positioned relatively to each other that a glven scarf will be produced,

and treadle controlled means are provided for varying the relative positions of these members to. vary the character of the scarf. By making use of this feature in connection with the feature last mentioned above, it is possible to produce three different scarfs without making any ad ustment other than to manipulate the treadle. i

These and other features of the invention will be described in connection with an illusk Figs. 4, 5 and 6 are elevations showing the.

productionof the three different scarfs and sectional views of the scarfs themselves.

The machine comprises a rotary, disk.

knife, the plane of the cut of which is indi cated by the broken line7, a feed disk 9, a

feed roll 11, a presser foot 13 and an edge gage 15 all of which parts, except the feed roll, may be likethose shown in the patent to Bayley referred to above. The roll, knife and feed disk are rotated by suitable mechanism such, for example, as that shown in the patent, and in general the illustrative machine is like that of the patent except for certain features which will be described in detail. It will be understood that the work is fed by the rotating disk 9 and roll 11 be duced along the margin of the work.

by the usual thumb screw 25.

With a machine like that of the patent to Bayl'ey and the knife in the position shown in Fig. 1 of that patent, that is with the plane of its cutting edge substantially parallel to the adjacent element of the conical surface of the roll, a so-called shoulder scarf will be produced. In a of the accompanying drawings, a shoulder scarf is shown although not one of the exact shape which would be produced by the Bayley machine, such a scarf in general consisting of a gouged out or, as in the illustrative case,

a tapering portion terminating in a portion of uniform thickness; 1f now it is desired to produce on the machine of Bayley a. seam scarf such as is shown in Fig.5 of the accompanying drawings, it is necessary to adjust both the knife and the edge gage. In other words, it is necessary to adjust certain parts of. th machine for each different scarf.

- in the present illustrative machine the position of the knife remains unchanged, its cutting edgebeing at all times substantially parallel to the adjacent element of the conical surface formed on the inner end of the feed roll. The feed roll comprises two substantially frusto-conical sections having opposed bases, an-inner section 1? and an outer section 19. Besides 'these'two sections there is the. usual cylindricalsection'21 which c0- operates withthe feed disk 9; the shoulder scarf produced by operating withthe work resting upon the section 17 shall have a tapering rather than a gouged out shoulder, the ridge which would otherwise result at the junction of the sections 17 and 19 is ground ofi slightly in the illustrative construction. It has been customary in some cases to provide a roll having a coni cal sectionlocated much as is the conical section 19, as is shown for example in the patent to Davenport No. 578,5 1? 5 but the present conical section, unlike that of Davenport, is adapted to permit the skiving of worksupported upon it.

"Cooperating with this roll are the usual presser 500 3 13 and edge gage 15, the foot being fast to the endof the usual spring tongue 23 and being adjustable vertically Associated with thegag'e' 15, which will be referred to as a stationary gage, is a vertically movable gage27 said movablegage being pivoted at 29 to a block 31 which is slidable in an undercut groove in the base 33 of the stationary gage 15. A screw 35 fastened to the block 31 by a pin 37 and extending into a bracket 89 has threaded upon it a thumbqiutdl held from longitudinal-movement as shown, whereby turning of the thumb-nut movesthe gage 27 along the roll. By reason of the pivoting In order that of the gage 27 at the point 29. the work may, if desired, be introduced beneath said gage and presented to the. stationary gage 15. in order to hold the gage 2,7 in desired position, it is supportedby the lowerheaded end of a screw 43 which passes through a suitable hole in an overhanging arm of the block 31.

A spring d5, which rests with its lower end 011 the stem of-the gage 27 and with its upper end' against the under side of the overhanging arm tends at all times to swing the gage downwardly, the distance to which "plained in my Patent No. 1,138,645, without making any adjustments, the operator presenting the edge of the work to either gage as may be desired.

Referring now more particularly to Figs. 4. and 5, the gages 15 and 27 are placed in the desired positions which may be as shown.

That edge of the work upon which a shoulder scarf is desired is introduced beneath the gage 27 and presented to the stationary gage 15, whereupon a shoulder scarf like that shown in Fig. 4 is produced. That ed e of the work upon which a seam scarf is desired is then presented tothe gage 27, with the result illustrated in Fig. It will be noted that the seam scarf of Fig. 5 could be produced by cutting 05 the shoulder scarf at the lower extremity of its beveled portion. Of course that is not the way in which it is produced by the machine but attention is directed to the fact that the beveled portions of the two scarfs have the same in clination;

lnorderto roduce the feather edge scarf of Fig. 6 it is necessary to change the relation between the knife and the feed roll, and in the illustrated machine the feed roll is raised a predetermined amount. The shaft 53 of the feed roll is mounted in bearings in a carrier 55 which is pivotedat 57 to the frame of the machine. A screw 59, the upper end having a head which fits in a groove inthe forward bearingof the roll shaft, extends through a threaded sleeve 61 'andhas threaded on its lower end a iii when desired, by pulling down on a treadle rod 67 to rock a lever 69. This lever is pivoted to the block 68 at 71 and extends beneath a boss73 formed on the under side of the bearing 75. It should be particularly noted that the extent of possible upward movement of the roll is'very small in comparison with the distance of the roll from the point 57 about which it swings so that the change of inclination of the axis of the roll which results from manipulating the treadle is negligible.

It has been pointed out above that the seam scarf of Fig. could be produced by cutting off the shoulder scarf of Fig. 4 at the lower extremity of its beveled portion. It should now be noted that the feather edge scarf of Fig. 6 could be pro duced by cutting off the shoulder scarf of Fig. 4 in an inclined plane coincidingwith the plane of the tapered portion.

The operation of the machine is as follows: With the parts in the positions shown in Figs. a and 5, the operator presents the edge of the work either to the gage or to the gage 27, as may be desired, to roduce a shoulder scarf or a seam scarf. t is, of course, immaterial whether the gages are in the exact positions shown. For example, a longer shoulder scarf and ,a longer seam scarf will be produced if both gages are set farther to the right; and in such case the seam scarf will have a short extent the thickness. of which is uniform. When it is desired to produce a feather edge scarf the roll will be raised slightly by means of the treadle, and the edge ofthe work presented against the gage 27 as indicated in Fig. 6.

Although the invention has been set forth in connection with a particular machine it should be understood that the invention is not limited in the scope of its application to the particular machine which has been shown and described.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States is l. A machine of the class described, having, in combination, a knife, a feed roll for advancing the work to the knife said roll comprising two substantially frusto-conical sections having opposed bases, each section being adapted to permit skiving of work upon it, and an edge gage adjustable longitudinally of the roll, whereby a shoulder scarf and a straight scarf may be produced while maintaining unchanged the relation of the knife and roll.

2. A. machine of the class described, having, in combination, a skiving knife, a feed roll for advancing the work to the knife, work gaging means having a member beneath which the work may be introduced or against which it may be held, and means for raising the roll.

3. A machine of the class described, having, in combination, a skiving knife, a feed roll for advancing the work to the knife, said roll having working surfaces of two inclinations, and Work gaging means having a member arranged to guide the work over one of the surfaces to produce a shoulder scarf and a second member arranged to guide the work over the other surface to produce a straight scarf.

4:. A machine of the class described, hav ing, in combination, a skiving knife, a feed roll for advancing the work to the knife, said roll having working surfaces of two inclinations, work gaging means having a member arranged to guide the work over one of the surfaces to produce a shoulder scarf and a second member arranged to guide the work over the other surface to produce a straight scarf, and means whereby the relation between the knife and roll may be changed to produce in connection with the second surface and the second gage a feather edge scarf.

A machine of the class described, having, in combination, a skiving knife, a feed roll for advancing the work to the knife, said roll having working surfaces of two inclinations, an edge gage arranged to guide the work over one of the surfaces to produce a shoulder scarf, a second edge gage arranged to guide the work over the other surface to produce a straight scarf, and means whereby the roll may be raised.

6. A machine of the class described, having, in combination, a skiving knife, a feed roll for advancing the work to the knife, said roll comprising two substantially frusto-conical sections having opposed bases, a stationary ed e gage arranged to cooperate with one section to produce a shoulder scarf, and a vertically movable edge gage arranged to cooperate with the other section to produce a straight scarf.

7 A machine of the class described, having, in combination, a skiving knife, a feed roll for advancing the work to the knife, said roll comprisin r two substantially frusto-conical sections having opposed bases, a stationary edge gage arranged to cooperate with one section to produce a shoulder scarf, a vertically movable edge gage arranged to cooperate with the other section to produce a straight scarf, and means whereby the relation between the knife and roll may be changed to produce in cooperation with the second section and the second gage a feather edge scarf.

8. A machine of the class described, having, in combination, a skiving knife, a feed roll for advancing the work to the knife said roll comprising two substantially frusto-conical sections having opposed bases, a stationary edge gage arranged to cooperate with one section to produce a shoulder scarf,

a vertically movable edge gage arranged to cocperate with the other section to produce a straight scarf, and means whereby, the roll may be raised.

9. A machine of the class described, having, in combinatiorna skiving knife, a feed roll for advancing the work to the knife said roll having working surfaces of two inclinations, anedge gage arranged to guide the work over one of the surfaces to produce a shoulder scarf, a second edgegagearranged to guide the work over the other surface to produce a straight scarf, and means whereby the distance between the gages may be varied.

10. A machine of the class described, hav ing, in combination, a skivingknife, a feed roll for advancing the work to the knife, said roll comprising two substantially frusto-conical sections having opposed bases, and work gaging means constructed and arranged to guide the work over one surface to producea straight scarf and to guide the work over the other surface to produce a shoulder scarf.

11. A machine of the class described, having, in combination, a skivin'gsknife, and a feed roll for advancing the work to the knife, said roll comprising two substantially frusto-conical sections having opposed bases, each section-being adapted to permit skiving of work upon it.

12. A machine of the class described, hav ing, in combination, a skiving knife,and a feed roll for advancing the work to the knife, said roll comprising two substantially frustc-conical sections having opposed bases, each section beingadapted to permit skiving of work upon it, and a presserfoot arranged to cocperate with both of the sections.

team

13. A machine of the class de$Qribed,having, in combination, a skiving knife, a' feed roll for advancing the work to the knife, said feed roll comprising a frusto-conical section adaptedto support the work in such manner that a seam scarf will be. produced by, the knife and means for raising the roll tofcause a feather edge scarf'to be produced.

14. A machine ofthe class described,having, in combination, a skiving knife, a feed roll for advancing the work to the knife, work gaging means having a member beneath which the work may be introduced or against which it maybe held, means for rotating the roll, and treadle controlled means for changing theposition of the roll.

15.111 a machine of the class described, having, in combination, a skiving knife, a feed roll for advancing the work to the knife, a pivoted member in whichthe feed roll is'r'evolnbly mounted, said roll normally occupying a position to produce with the knife a given character of scarf, and being freejatfalltimes to be moved, and treadle controlled means for moving the bearing about its pivot atany timeto cause the/production of a scarf of different character.

, l6. Ainachine of the class described, having, in combinatioina skiving knife, a feed roll for advancin the work to the knife, means for normal y holding the knife and roll'in relative positions to produce a given scarf, and treadle controlled means for varying-the relative positions of the knife and roll to varythe character of the scarf produced.

"In testimony whereof I have signed my name to this specification.

NEwnLn vnrnn. 

